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김태원,정원식,허남호,Kim, T.W.,Cheong, W.S.,Hur, N.H. 한국전자통신연구원 2013 전자통신동향분석 Vol.28 No.4
기존 2D 카메라로 획득된 영상은 공간에 존재하는 빛에 대한 손실된 정보를 담고 있어 그 응용에 한계를 가지고 있다. 그러나 공간 내에 존재하는 빛 정보를 획득하여 가지고 있다면 그 공간을 똑같이 인위적으로 다른 장소에서 그대로 재현해 낼 수 있어 다양한 분야에 응용할 수 있을 것으로 기대된다. 근래에 이러한 빛 정보를 획득하기 위한 카메라 기술 및 장치들에 대한 연구개발이 활발히 진행되고 있다. 본고에서는 공간에 존재하는 빛 정보를 나타내기 위한 light field 개념을 소개하고, light field 정보 획득 카메라 기술 및 장치에 대해 살펴본다. 또한 기 개발된 light field 카메라들의 특정들을 비교 분석하고, 다양한 응용 사례에 대해 알아보기로 한다.
김태원(T. W. Kim),서판기(P. K. Seo),오세웅(S. W. Oh),강충길(C. G. Kang) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
The rotational barrel type equipment has been designed for the new rheology fabrication process. During the continuous rotation of barrel with a constant temperature, the shear rate is controlled with the rotation speed and rotation time of barrel. The barrel surface can be controlled the temperature by the induction heating and cooling system. Many experiments were widely examined by using this system with controlling the rotation speed and the rotation time. The possibility for the rheoforming process was investigated with microstructural characteristics.
SCN-TLM법을 이용한 스텝 불연속 마이크로스트립 라인 해석
김태원(T. W. Kim),신용조(Y. J. Shin),김윤석(Y. S. Kim),이상희(S. H. Lee) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.7
The SCN-TLM method presented in this paper is another independent approaches for obtaining frequency domain results for microstrip line. The structure analysed with this TLM algorithm is step discontinuity microstrip line and the symmetrical condensed node is used. After numerical analysis, the frequency dependent scattering parameters of a step discontinuity micros trip line have been calculated by Fourier transform of the time domain data. From the time domain TLM numerical results, this numerical analysis is shown to be an efficient method for modelling complicated structure as step discontinuity microstrip line.
김태원(T.W.Kim),서일홍(I.H.Suh),조영조(Y.J.Cho) 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
It is shown that there exists a nonlinear mappping which transforms features and their changes to the desired camera motion without measurement of the relative distance between the camera and the part, and the nonlinear mapping can eliminate several difficulties encountered when using the inverse of the feature Jacobian as in the usual feature-based visual feedback controls. And insted of analytically deriving the closed form of such a nonlinear mapping, a fuzzy membership function (FMF) based neural network is then proposed to approximate the nonlinear mapping, where the sutructure of proposed networks is similar to that of radial basis function neural network which is known to be very useful in function approximations. The proposed FMF network is trained to be capable of tracking moving parts in the whole work space along the line of sight. For the effective implementation of proposed FMF networks, an image feature selection processing is investigated, and required fuzzy membership functions are designed. Finally, several numerical examples are illustrated to show the validities of our proposed visual servoing method.